OK, the jack you are connecting to shorts the circuit, or you need a filter, or you need to isolate the jack location you want for broadband. SO, what the later means, is, make certain that your broadband signal only goes to that jack, and does not chain to other jacks. It needs to the ONLY jack on that circuit. Or make certain that your wiring is Cat5 or better. If your wiring is cat3 and not Twisted pair, then you need to pull new wire as the ring voltage is killing the SYNCH signal over the pairs when the phone rings, or you get dial tone.